Photovoltaic Solar panels cost has been diminishing drastically in the past years and is expected to continue its down slope for some time; the cost of solar panels is a variable that actually depends on the time, place and scale of your solar panel installation.
The great reduction witnessed in solar panels cost has been driven primarily by consecutive technological breakthroughs in the production of solar cells and the improvements in the manufacturing of solar panels. In addition, the need towards green energy has driven an increased use of renewable energy sources, and particularly solar energy technologies within the global energy chain. To facilitate penetration of Solar Panel Installations in the production of green energy governments have given various incentives to make solar energy more affordable and attractive and stimulate demand for solar panels. Solar energy companies have acknowledged both the need towards green solar energy and the opportunity to explore both solar energy and financial incentives in a fast growing market. Solar energy installers and solar energy companies compete in a very competitive environment (national and global) driving the aforementioned drop in solar panels cost.
So what is currently the cost of solar PV panels? – In a very simplistic approach, current overall cost figures in recently updated prices range between $1700-$2500 per Kw of installed photovoltaic (PV) panels (installed capacity). However, when it comes to estimating the cost of solar panels for a specific solar panel installation (e.g. residential solar panels and solar panels for home or for a commercial power plant) one needs to consider other factors apart from direct purchase cost per kw. Other factors influencing the overall solar panel cost include the efficiency and life expectancy of the solar panels, installation costs including actual installation of the solar panels and electrical connections, additional equipment required such as inverters, batteries and cabling. Of course, financial appraisal of a solar panel installation requires that we also consider income factors on a net cash flow statement together with related costs. The income from installing solar PV panels is very much dependent on a range of factors that can actually make a project financially viable or not.
Apart from the Solar Panel Efficiency which is given by the solar panel manufacturer, income from installing your home solar panels will depend also on your location’s climatic and morphological conditions (solar radiance – solar potential, environmental conditions, solar panel orientation, whether solar radiation is obstructed etc.),and on the financial incentives scheme applicable to your solar panel installation. One need to consider that as solar panels costs diminish so is the required scale of financial incentives (e.g. FITS – Feed-In-Tariffs) that aim to make solar energy installations more affordable or financially viable and profitable. For example, the Feed in tariffs in an EU member state has changed from €0.35 per KWh in 2010 to €0.28 per KWh in 2012; i.e. in two years FITs has reduced by 20%. This reduction in FITs actually reflects the reduction in overall solar panel costs. In addition to FITs, you should also consider that certain subsidy schemes have different options and requirements depending on the type of solar panel installation. For example incentive schemes for home solar panel installations allow for smaller sizes of installed capacity (wattage) and a higher rate of FIT per kwh produced than the schemes for commercial solar energy installations. In addition, non-residential solar panel installations may require additional investment costs on the installation site (e.g. requiring special fencing, a small power station etc.) driving the overall cost upwards.
Different solar panel companies offer various alternative solutions with respect to efficiency, life-expectancy, and size; e.g. a 1 kw solar system can be achieved by different panel sizes altering the overall surface area required for the installation. It may be comprised by 8 panels of 125 W or 5 panels of 200w, or 4 panels of 250w, etc. In all different solutions you should be able to gather comparable solar panel cost information in order to be able to compare the different solutions.
For home solar panels installations you can have roof-mounted or land-mounted solutions, with the former, if circumstances allow it – e.g. south facing, unobstructed solar radiation etc, can be a preferable solution as it takes advantage of otherwise unused space on the roof, leaving ground space unaffected. In general, the most suitable and more cost effective solution regarding where panels are mounted will be case specific subject to custom circumstances (e.g. if roof is strong enough for installing PV structures, if there are other installations such as solar water heaters, chimneys or trees obstructing solar radiation).
Tracking system are special installations that can track the solar projectile increasing the exposure time of solar panels to the sun, thus increasing production and efficiency of solar panels. However, solar panel tracking systems can only (in most cases) be installed on ground-mounted PV installations and they have a considerable cost; it is thus advisable that, before deciding upon tracking systems, you should perform a cost-benefit analysis for your specific case.
The PV panels’ circuit will need batteries and inverters to store electrical energy and convert it to alternating current. They are both expensive equipment that certainly have an impact on solar panels efficiency and overall performance of solar panels.
Most non-residential ground mounted solar panel installations will require site fencing and, depending on the size of installation, a small power station. Apart from site fencing, you may also wish to explore other protective mechanisms in order to protect your investment, such as security cameras for surveillance in closed circuit and insurance. If you are installing PV panels under a FITs plan, apart from insuring your solar panel equipment, you may also find useful to ask your insurance company for insuring your generated income from solar panel electricity.
Depending on the scale, location and type of your solar panels installation you may need to issue a Planning permission for the local authorities – this is usually a procedure that has a small fixed cost (fee) for small scale applications – However, larger scale solar panel installations have higher licensing costs because they usually require additional documentation in issuing a license for installation (e.g. assessment of environmental impact from the solar panels installation, etc.)
Though solar panels do not impose any serious operating expenses (as compared to other technologies incorporating more moving-mechanical parts), yet cleaning and maintenance expenses should be considered on a minimum basis to secure frequent and effective cleaning of the panels. This will help increase solar panels’ efficiency and production rate while it will also help prolong the solar panel’s life. Maintaining clean solar panels at peak production times will pay off through your FITs income scheme.
Considering these factors, it is easily understood that while making a decision for your home solar panels it may be a good idea to consult with a certified solar panel installer for assistance and professional advice.
Some important figures for estimating solar panel costs and income from your home solar panel installation are summarized below:
In assessing the financial viability of a solar panel installation one should not only consider overall total investment (cost) but the overall system’s performance and ability to generate cash flows across its projected life-span. Therefore, the most valuable solution amongst alternatives may not necessarily be the one with lower initial investment if it yields a higher output, or if it lasts longer enough to off-set its extra cost; the most valuable solution is thus decided by considering all factors mentioned above.